![Floor open up and Drainage foam applied.](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/443425-foam-over-vrack.jpg?v=1671475739)
Floor open up and Drainage foam applied.
After the concrete floor is opened, the next two steps is to put a flexible sealnt intot he crack and then add an open cell foam as a drainage system over top.
![Foam into the opened floor.](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/443426-foam-in-hole.jpg?v=1671475739)
Foam into the opened floor.
THe most important part is to open the floor and expose the footing.
![Seant is applied](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/443428-bostik-over-foam.jpg?v=1671475739)
Seant is applied
A flexible sealant is applied over the foam and ready to be troweled.
![Drainage foam troweled over](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/443427-troweled.jpg?v=1671475739)
Drainage foam troweled over
The flexible sealant is troweled over to completely seal the crack.
![Wateproof cover.](https://cdn.treehouseinternetgroup.com/uploads/photo_gallery/medium/443429-cleanspace.jpg?v=1671475739)
Wateproof cover.
The last two steps are to cover the entire area with a membrane that is mechanically fastened and caulked so no water can get past. Then the floor is preconcerted back again.